Tens of thousands of people turned out for a protest in central Moscow Monday marking one year since a demonstration ahead of Vladimir Putin's Kremlin inauguration ended in mass arrests. “The whole square is full. There are tens of thousands of us,” prominent opposition figure Boris Nemtsov told a huge sea of people crammed into Bolotnaya Square across the Moscow river from the Kremlin. Police however said only 6,000 were present at the start. The picture shows a poster with a picture of opposition leader Sergei Udaltsov (left). — Reuters